JP2003106343A - Electromagnetic clutch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic clutch device facilitating torque measurement of a pilot clutch structure by forming the pilot clutch structure into a module to make it attachable/detachable to/from the structure. SOLUTION: The pilot clutch structure 30 is formed in a module structure in which a pilot clutch plate group 31, an electromagnetic solenoid 33, and an armature 34 are combined in a unit. The pilot clutch plate group 31 is attachable/detachably connected to the cam input 41 of a ball cam 40, while engaging the pilot clutch structure 30 formed in a module with one of internal and external peripheral rotary members 50, 60 in the rotating direction. Torque of the pilot clutch structure 30 can be independently measured separately from the main clutch structure 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic clutch device in which a main clutch mechanism is permanently engaged via a pilot clutch mechanism preliminarily engaged by an electromagnetic solenoid.

[0002]

2. Description of the Related Art As a conventional electromagnetic clutch device, there is one shown in FIG. 5 and one shown in FIG. 6 disclosed in Japanese Patent Application Laid-Open No. 10-329562. The electromagnetic clutch device 1 of FIG. 5 and the electromagnetic clutch device 1a of FIG.
Will be described by assigning the same reference numerals to the same components.

In the electromagnetic clutch devices 1 and 1a, a main clutch mechanism 4 is arranged between an inner shaft (inner peripheral rotating member) 2 and an outer housing (outer peripheral rotating member) 3 which are concentrically arranged. Along with the main clutch mechanism 4, a pilot clutch mechanism 5 is coaxially arranged.

The pilot clutch mechanism 5 includes a pilot clutch plate group 5a, a clutch rotor 5b, an electromagnetic solenoid 5c, and an armature 5d. The outer peripheral portions of the pilot clutch plate group 5a and the armature 5d are the outer shafts. 3 is splined to the spline 3a for the main clutch mechanism 4 formed on the inner circumference.

On the other hand, the inner peripheral portion of the pilot clutch plate group 5a is splined to the spline 6b formed on the outer periphery of the cam input portion 6a of the cam mechanism 6 arranged between the main clutch mechanism 4 and the pilot clutch mechanism 5. To be done.

Then, the armature 5d is attracted by the magnetic circuit M (see FIG. 6) formed by energizing the electromagnetic solenoid 5c, and the pilot clutch plate group 5a is provided between the armature 5d and the clutch rotor 5b.
Is pressed and fastened, the rotational force of the outer shaft 3 is transmitted to the cam input portion 6a of the cam mechanism 6.

The cam mechanism 6 converts the input rotational force into a pressing force in the axial direction and transmits it to the pressure plate 6c, and the main clutch mechanism 4 is fastened by the pressure plate 6c.

[0008]

However, in the conventional electromagnetic clutch device 1 as described above, the torque is measured after the assembly is completed, and the desired output torque is obtained by the balance between the main clutch mechanism 4 and the pilot clutch mechanism 5. Is adjusted so that

Therefore, when the output in the preset target torque range cannot be obtained, the pilot clutch mechanism 5 is removed, the electromagnetic solenoid 5c is replaced, and the like.

However, since the main clutch mechanism 4 and the pilot clutch mechanism 5 share the spline 3a for the main clutch mechanism 4 and the pilot clutch plate group 5a and the armature 5d are assembled, when the pilot clutch mechanism 5 is removed. , The pilot clutch plate group 5a, the clutch rotor 5b, the electromagnetic solenoid 5c, the armature 5d, etc., the coil holder 7 and the bearing 7a for rotatably supporting the coil holder 7 on the clutch rotor 5b are also removed. Need to assemble.

Therefore, the disassembling / assembling work requires a long time, and the work efficiency of the torque adjustment is significantly deteriorated.

Further, the conventional electromagnetic clutch device 1 is
Due to the fact that the pilot clutch plate group 5a and the armature 5d are assembled by sharing the spline 3a for the main clutch mechanism 4, the relative rotation portion from the cam mechanism 6 to the main clutch mechanism 4 is abraded with the passage of time, so that the armature 5d and pressure armor 5d. Gap δ between plate 6c
When (see Figure 5) is increased, inevitably Armature 5
d largely moves to the main clutch mechanism 4 side.

Then, the armature 5d is separated from the pilot clutch plate group 5a, and the distance from the clutch rotor 5b is increased, and the influence of the electromagnetic force generated by the electromagnetic solenoid 5c is reduced. For this reason, the initial operation when engaging the pilot clutch mechanism 5 tends to be delayed, and eventually the main clutch mechanism 4 is delayed in engagement.

Therefore, the present invention has been made in view of the above-mentioned conventional problems. By modularizing the pilot clutch mechanism so as to be attachable to and detachable from the main clutch mechanism, torque measurement of the pilot clutch mechanism is facilitated. Moreover, by positioning the armature on the side of the modularized pilot clutch mechanism, the attraction force of the armature is reduced by the electromagnetic solenoid without being affected by the wear over time of the relative rotating part from the cam mechanism to the main clutch mechanism. An object is to provide an electromagnetic clutch device that can be prevented.

[0015]

In order to achieve such an object, the invention of claim 1 provides a main clutch mechanism formed between an inner peripheral side rotating member and an outer peripheral side rotating member arranged concentrically. , A cam mechanism that converts the rotational force input to the cam input portion into a pressure contact force in the axial direction and transmits it to the main clutch mechanism, and the rotation of either the inner or outer peripheral side rotating member in the engaged state by the cam. And a pilot clutch mechanism for controlling transmission to an input portion, wherein the pilot clutch mechanism is disposed on one side of the pilot clutch plate group and is disposed on one side of the pilot clutch plate group, and either the inner or outer peripheral side rotating member is provided. A clutch rotor to which one rotation is input, an electromagnetic solenoid provided on the clutch rotor, and an electromagnetic solenoid disposed on the other side of the pilot clutch plate group. An armature that is attracted by an electromagnetic force generated in a noid, wherein the pilot clutch plate group is pressed into contact with the clutch rotor by attraction of the armature, and the electromagnetic clutch device that fastens the pilot clutch mechanism, The pilot clutch mechanism has a modular structure in which the clutch rotor is integrally assembled with the pilot clutch plate group, the electromagnetic solenoid, and the armature, and the modularized pilot clutch mechanism includes the clutch rotor that rotates the inner and outer peripheral side members. It is characterized in that it is detachably coupled while being engaged with one of them in the rotational direction.

In this case, the pilot clutch mechanism has a modular structure in which the clutch rotor is integrally assembled with the pilot clutch plate group, the electromagnetic solenoid and the armature, so that only the pilot clutch mechanism can be constructed as an independent structure.

Even when the pilot clutch mechanism is modularized as described above, the clutch rotor is engaged with one of the inner and outer peripheral side rotating members in the rotational direction,
Rotational force can be input to the pilot clutch plate group. Then, by engaging the pilot clutch mechanism, the cam mechanism can be operated by the rotational force input to the pilot clutch plate group to engage the main clutch mechanism.

Therefore, it is possible to take out only the modularized pilot clutch mechanism from the electromagnetic clutch device, and measure the torque of this pilot clutch mechanism separately from the main clutch mechanism.

Therefore, the torque of the entire electromagnetic clutch device can be easily set within the set range only by assembling the torque-adjusted pilot clutch mechanism to the main clutch mechanism set to the predetermined output torque.

According to a second aspect of the present invention, in the electromagnetic clutch device according to the first aspect, the modularized pilot clutch mechanism is provided on a spline formed on an inner circumference of a clutch rotor from the end side of the spline to the pilot. The clutch plate group and the armature are splined in this order, and a retaining member for the armature is provided on the inner circumference of the clutch rotor in which the spline is formed.

In this case, in addition to the operation of the electromagnetic clutch device according to the first aspect, the pilot clutch plate group and the armature splined to the clutch rotor are movable along the spline in the rotation center axis direction of the clutch rotor. When the armature is attracted to the electromagnetic solenoid, the pilot clutch plate group together with the armature is pressed against the clutch rotor side and fastened. At this time, the position of the armature in the direction away from the pilot clutch plate group is restricted by the retaining member provided at the end of the spline.

Therefore, by setting the position of the retaining member so that the optimum distance is provided between the armature and the pilot clutch plate group, the regulating position of the armature is changed from the cam mechanism to the main clutch mechanism. Can be held constant regardless of the wear of the relative rotating parts up to.

According to a third aspect of the present invention, in the electromagnetic clutch device according to the second aspect, notches are formed at appropriate intervals in a circumferential direction in a portion of the clutch rotor where the retaining member is arranged. I am trying.

In this case, in addition to the operation of the electromagnetic clutch device according to the second aspect, a magnetic circuit passing through the clutch rotor is formed by the magnetic flux generated from the electromagnetic solenoid, and the armature is attracted by this magnetic circuit. Since the notch portions are formed at appropriate intervals in the circumferential direction in the portion of the clutch rotor where the retaining member is disposed, the contact area of the retaining member with the clutch rotor is reduced and the clutch rotor passes through the clutch rotor. The amount of magnetic flux leaking to the retaining member can be reduced.

According to a fourth aspect of the present invention, in the electromagnetic clutch device according to the second or third aspect, the clutch rotor divides a rotor main body portion in which the electromagnetic solenoid is arranged and an annular portion forming the spline. Each of them is processed as a separate body, and the divided rotor main body portion and the annular portion are integrally connected.

In this case, in addition to the operation of the electromagnetic clutch device according to the second and third aspects, the annular portion and the rotor main body portion are divided and separately formed to form a spline that requires precision. Since the annular portion to be formed and the rotor main body portion having a relatively simple structure can be formed separately, it is possible to facilitate the processing of each and to use different materials for the annular portion and the rotor main body portion. You can also

By forming the annular portion and the non-magnetic material, it is possible to suppress leakage of magnetic flux which reduces the attraction force to the armature.

According to a fifth aspect of the present invention, in the electromagnetic clutch device according to any one of the first to fourth aspects, the clutch rotor of the modularized pilot clutch mechanism has the inner and outer circumferences that are rotationally input to the clutch rotor. It is characterized in that it is screwed to one of the side rotation members via a screw portion.

In this case, in addition to the operation of the electromagnetic clutch device according to the first to fourth aspects, since the clutch rotor is screwed to one of the inner and outer peripheral side rotating members via the screw portion, the modularized pilot is provided. It is possible to accurately set the relative distance between the clutch mechanism, particularly the armature positioned on the clutch rotor and the cam mechanism and the main clutch mechanism.

According to a sixth aspect of the present invention, in the electromagnetic clutch device according to any one of the first to fourth aspects, the clutch rotor of the modularized pilot clutch mechanism has the inner and outer circumferences that are rotationally input to the clutch rotor. It is characterized in that it is spline-coupled to one of the side rotation members, and that the outer end of the clutch rotor is retained and fixed by a nut member screwed to one of the inner and outer rotation members via a screw portion. There is.

In this case, in addition to the operation of the electromagnetic clutch device according to the first to fourth aspects, the clutch rotor on which a large torque acts can be supported by one of the inner and outer peripheral side rotating members via the spline connection. The supporting strength can be kept high, and the clutch rotor coupled to the spline can be securely held by the nut member.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

(First Embodiment) FIGS. 1 and 2 show a first embodiment of an electromagnetic clutch device of the present invention. FIG. 1 is a sectional view of the electromagnetic clutch device, and FIG. 2 is an end of a clutch rotor on a spline forming side. It is explanatory drawing which shows a part shape with a top view (a) and an end view (b).

As shown in FIG. 1, the electromagnetic clutch device 10 of this embodiment includes a main clutch mechanism 20 and a pilot clutch mechanism 30, and the main clutch mechanism 2
0 and the pilot clutch mechanism 30, a ball cam 40 serving as a cam mechanism is provided.

As shown in FIG. 1, the main clutch mechanism 20 includes an inner shaft 5 as an inner peripheral side rotating member.
0 and an outer housing 60 as an outer peripheral side rotation member, and torque is transmitted between the inner shaft 50 and the outer housing 60 by engaging the main clutch mechanism 20.

As shown in FIG. 1, the inner shaft 50 has a hollow portion 51 formed on its central axis, and
A large diameter portion 52 is formed in a portion corresponding to the main clutch mechanism 20, and a small diameter portion 53 is formed in a portion corresponding to the pilot clutch mechanism 30.

A spline 54 is formed on the outer circumference of the large diameter portion 52 corresponding to the main clutch mechanism 20.

As shown in FIG. 1, the outer housing 60 has an end wall 61 on the side opposite to the side on which the pilot clutch mechanism 30 is arranged (on the left side), whose diameter is reduced by an end wall 61. An end portion of the inner shaft 50 on the large diameter portion 52 side is rotatably supported by 61a via a ball bearing 11 and has a liquid-tight structure via an X ring 12.

Further, a spline 62 is formed on the inner circumference of the central portion of the outer housing 60 corresponding to the main clutch mechanism 20.

On the spline 54 of the inner shaft 50, a plurality of inner plates 21a constituting the main clutch plate group 21 of the main clutch mechanism 20.
The inner peripheral portion of the outer housing 60 is spline-coupled, and the spline 62 of the outer housing 60 has a plurality of outer plates 21 that form the main clutch plate group 21.
b is spline-joined.

A pair of outer plates 21b are disposed on both friction surfaces of each inner plate 21a, and the outer plates 21b are arranged in a laminated state in the direction of the rotation center axis. The inner plate 21a arranged at the end of the main clutch plate group 21 on the pilot clutch mechanism 30 side (the right side in the drawing) is arranged from the outer friction surface to the outer plate 21b.
Have been eliminated.

As shown in FIG. 1, the ball cam 40 is fitted and arranged at the end of the small diameter portion 53 of the inner shaft 50 on the large diameter portion 52 side, and has a ring-shaped cam input portion 41 and a ring-shaped cam input portion 41. The pressure plate 42 and the ball 43 arranged between the cam input portion 41 and the pressure plate 42.

On the opposing surfaces of the cam input portion 41 and the pressure plate 42, inclined surfaces (not shown) whose inclination directions are opposite to each other across the ball 43 are formed. When the cam input portion 41 and the pressure plate 42 are relatively rotated by the input rotation, the inclined surface relatively moves with the ball 43 interposed therebetween, so that the cam input portion 41 and the pressure plate 42 are separated from each other. Move in the direction of the axis.

At this time, since the cam input portion 41 is positioned on the inner shaft 50 via the thrust bearing 44, the amount of movement of the cam input portion 41 and the pressure plate 42 in the separating direction is limited to this pressure plate 42. The pressure plate 42 acts to move the inner plate 21a at the end of the main clutch plate group 21.
It is designed to be pressed against. A spline 45 is formed on the outer circumference of the cam input portion 41.

The pilot clutch mechanism 30 is shown in FIG.
As shown, the pilot clutch plate group 31, the clutch rotor 32 arranged on one side (right side in the figure) of the pilot clutch plate group 31, and the clutch rotor 3
2 and an armature 34 which is arranged on the other side (left side in the figure) of the pilot clutch plate group 31 and is attracted by the electromagnetic force generated in the electromagnetic solenoid 33.

As shown in FIG. 1, the clutch rotor 32 includes a rotor main body portion 32a to which the electromagnetic solenoid 33 is attached, and a central shaft of the inner shaft 50 from which the main clutch mechanism 20 extends from the outer peripheral portion of the rotor main body portion 32a. And an annular portion 32b whose center is.

The inner peripheral portion of the clutch rotor 32 is rotatably fitted and supported by the small diameter portion 53 of the inner shaft 50 via the roller bearing 13, and has a liquid-tight structure via the X ring 14. .

The rotor main body portion 32a has an annular recess 3 centered on the inner shaft 50 on the side opposite to the side where the pilot clutch plate group 31 is arranged (right side in the figure).
2d is formed.

The electromagnetic solenoid 33 formed in an annular shape is housed in the annular recess 32d of the rotor main body portion 32a.
It is held by a support ring 35 that is rotatably fitted in the 2d opening 32e. In addition, the support ring 35 is connected to the clutch rotor 32 via the ball bearing 15.
Is rotatably supported by.

Here, in the present embodiment, as shown in FIG. 1, a spline 32c is formed on the inner circumference of the annular portion 32b, and the end of the spline 32c (the left end in the figure) is located inside the annular portion 32b. , The pilot clutch plate group 31 and the armature 34 are fitted in this order, the pilot clutch plate group 31 and the armature 34 are spline-coupled to the spline 32c, and the annular recess 32d is formed.
The pilot clutch mechanism 30 is formed as a module structure together with the electromagnetic solenoid 33 housed in.
Incidentally, 33a is a harness for applying a current to the electromagnetic solenoid 33.

That is, the pilot clutch plate group 31 is constructed by arranging the outer plates 31a and the inner plates 31b alternately in the central axis direction, and the outer peripheral edge portion of the outer plate 31a is splined to the splines 32c.

On the other hand, the inner plate 31b is configured such that its inner peripheral edge portion is detachably spline-coupled to the spline 45 formed on the cam input portion 41 of the ball cam 40.

The armature 34 has substantially the same shape as the friction surface of the pilot clutch plate group 31, and the outer peripheral edge of the armature 34 is splined to the spline 32c.

A circumferential groove 70a is formed on the inner circumference of the end of the annular portion 32b, and a snap ring 70 as a retaining member is locked in the circumferential groove 70a. It is designed to be retained and positioned.

As shown in FIG. 2, in the annular portion 32b, a plurality of (four in this embodiment) cutouts 70b are provided at appropriate intervals in the circumferential direction at the ends where the circumferential grooves 70a are formed. Has been formed. These notches 70b are
It is desirable to have a sufficient length in the circumferential direction. Incidentally, FIG.
Inside, (a) is a plan view showing the main part of the annular portion 32b,
(B) is an end view of the annular portion 32b, and in (b), the inner peripheral portion shown by the solid line represents the spline 32c.

The clutch rotor 32 of the pilot clutch mechanism 30 which is modularized has the armature 3 from the opening 63 of the outer housing 60.
The male screw portion 32e formed on the outer periphery of the outer end portion of the clutch rotor 32 while being closely inserted with the 4 side facing inward.
Is attached to the female screw portion 64 formed on the inner circumference of the end portion of the outer housing 60 so as to be detachably attached. At this time, the O-ring 16 is provided between the outer circumference of the clutch rotor 32 and the inner circumference of the outer housing 60.
It is made a liquid tight structure.

A nut 16 is screwed into the end of the male screw portion 32e protruding from the opening 63 to form a W nut structure. By tightening the nut 16, the clutch rotor 32 is positioned at a predetermined position with respect to the outer housing 60. It is designed to be fixed to.

By the way, in this embodiment, when the pilot clutch mechanism 30 is modularized, as shown in FIG.
As shown in FIG. 5, a step portion 41 is provided on the outer periphery of the end portion of the cam input portion 41 of the ball cam 40 on the pressure plate 42 side (left side in the drawing).
While a is formed, an annular convex portion 34a that engages with the step portion 41a is formed on the inner peripheral portion of the armature 34,
When removing the modularized pilot clutch mechanism 30, the annular convex portion 34a is locked to the step portion 41a, and the cam input portion 41 is also integrally removed.

(Operation) In the electromagnetic clutch device 10 of the present embodiment having the above-described structure, the pilot clutch mechanism 30 includes the pilot rotor plate 32, the electromagnetic clutch 33 and the armature 34 in the clutch rotor 32.
The magnetic flux generated from the electromagnetic solenoid 33 is applied to the electromagnetic solenoid 33 by applying a current to the electromagnetic solenoid 33 even when modularized as described above. The outer peripheral portion of the portion 32a, the outer peripheral portion of the pilot clutch plate group 31, the armature 34, the inner peripheral portion of the pilot clutch plate group 31, the rotor body portion 32.
A magnetic circuit passing through the inner peripheral portion of a is formed.

The armature 34 is attracted by the magnetic attraction of the magnetic circuit, and the armature 3
4 and the clutch rotor 32, the pilot clutch plate group 31 is pressed in the central axis direction, whereby the pilot clutch mechanism 30 is fastened by the frictional force acting between the friction surfaces of the outer plates 31a and the inner plates 31b.

Then, the rotational force of the outer housing 60 is input to the clutch rotor 32 from the female screw portion 64 and the male screw portion 32e screwed together, and the ball cam 40 is passed through the fastened pilot clutch plate group 31.
Is input to the cam input unit 41.

Then, the cam input portion 41 and the pressure plate 42 are relatively rotated, and the pressure plate 42 presses the main clutch plate group 21 of the main clutch mechanism 20 in the central axis direction, and the main clutch. The mechanism 20 is fastened.

As a result, torque can be transmitted between the outer housing 60 and the inner shaft 51.
At this time, by controlling the current value applied to the electromagnetic solenoid 33, it is possible to cause the pilot clutch plate group 32c to slip and to engage the main clutch mechanism 20 in a half-clutch state, whereby the outer housing 60. The amount of torque transmission between the inner shaft 51 and the inner shaft 51 can be controlled.

In the modularized pilot clutch mechanism 30, the nut 17 is removed, the clutch rotor 32 is rotated, and the male screw portion 32e and the female screw portion 64 are loosened. Can be removed from.

Thus, the pilot clutch mechanism 30
Even when is removed, since it is modularized and configured as an independent structure, the removed pilot clutch mechanism 30 can be singly applied to a testing machine to measure the torque.

Therefore, the pilot clutch mechanism 30
When the output torque in the predetermined range cannot be obtained, the support ring 35 can be removed, the electromagnetic solenoid 33 can be easily removed from the annular recess 32d, and the torque can be measured again.

The pilot clutch mechanism 30 with the torque thus accurately set is assembled to the outer housing 60 provided with the main clutch mechanism 20 set to a predetermined output torque in advance. The torque can be easily set within the set range. Therefore, it is possible to improve the assembling property of the electromagnetic clutch device 10 at the time of measuring the torque and enhance the productivity.

Further, in this embodiment, the snap ring 70 is engaged with the circumferential groove 70a at the end of the annular portion 32b of the clutch rotor 32, and the armature 34 is separated from the pilot clutch plate group 31 by this snap ring 70. The directional position is restricted.

Therefore, by setting the snap ring 70 so that an optimum gap is provided between the armature 34 and the pilot clutch plate group 31, the regulation position of the armature 34 is changed from the ball cam 40 to the main clutch mechanism. It can be kept constant regardless of the wear of the relative rotating parts up to 20 over time. Therefore, the stable engagement timing of the pilot clutch mechanism 30 can be obtained at all times.

Further, in the annular portion 32b of the clutch rotor 32, notches 70b are formed at appropriate intervals in the circumferential direction in the portion where the snap ring 70 is arranged, so that the snap ring 70 with respect to the clutch rotor 32 is formed. The contact area can be reduced. Therefore, when the electromagnetic solenoid 33 is excited and the armature 34 is attracted, the magnetic flux of the electromagnetic solenoid 33 passing through the clutch rotor 32 can be prevented from leaking to the snap ring 70.

For this reason, the magnetic circuit acting on the armature 34 is prevented from weakening, the suction force of the armature 34 is kept high, and by extension the pilot clutch plate group 32c.
The pressing force of can be increased to increase the fastening force of the pilot clutch mechanism 30.

(Second Embodiment) FIG. 3 shows a second embodiment of the present invention, in which the same components as those in the above-mentioned embodiment are designated by the same reference numerals and a duplicate description will be omitted. 3 is a sectional view of the electromagnetic clutch device corresponding to FIG.

That is, the electromagnetic clutch device 1 of this embodiment
0a, as shown in FIG. 3, the clutch rotor 32,
Rotor body portion 32a in which the electromagnetic solenoid 33 is arranged
And the annular portion 32b forming the spline 32c are divided and processed as separate bodies, and the divided rotor body portion 32a and the annular portion 32b are integrally joined by welding W.

The rotor body portion 32a is made of iron, which is a magnetic material, to facilitate the formation of a magnetic circuit by the electromagnetic solenoid 33, and the annular portion 3a.
2b is formed of stainless steel which is a non-magnetic material that is less affected by the magnetic field.

Therefore, in this embodiment, since the annular portion 32b of the clutch rotor 32 is made of a non-magnetic material, it is possible to reduce the leakage of the magnetic force lines generated in the electromagnetic solenoid 33, so that the rotor main body portion 32a is prevented from leaking. The magnetic force of the formed magnetic circuit can be increased to increase the fastening force of the pilot clutch mechanism 30.

Of course, the rotor body portion 32a may be a magnetic material having a required strength other than iron, and the annular portion 32b may be a non-magnetic material having a required strength other than stainless steel.

Further, since the clutch rotor 32 is configured such that the annular portion 32b and the rotor main body portion 32a are divided and formed as separate bodies and then joined together, a spline 32c that requires precision is formed. The annular portion 32b can be easily processed, and the productivity of the clutch rotor 32 can be improved.

(Third Embodiment) FIG. 4 shows a third embodiment of the present invention, in which the same components as those in the above-mentioned embodiment are designated by the same reference numerals, and a duplicate description will be omitted. 4 is a sectional view of the electromagnetic clutch device corresponding to FIGS.

That is, the electromagnetic clutch device 1 of this embodiment
Reference numeral 0b denotes the modularized clutch rotor 32 of the pilot clutch mechanism 30, and the outer housing 6
Nut member that is spline-coupled to the opening portion 63 of 0 through a spline 65, and the outer end portion 32f of the clutch rotor 32 is screwed to a male screw portion 66 formed on the outer peripheral portion of the opening portion 63 of the outer housing 60. 6
It is designed to be stopped and fixed at 7.

The nut member 67 has the male screw portion 66.
Female thread forming portion 67a to be screwed into the clutch rotor 3 and the diameter of the female thread forming portion 67a reduced from the protruding portion of the female thread forming portion 67a.
2 and an abutting portion 67b that abuts on the outer side end portion 32f. Therefore, by screwing the female screw forming portion 67a of the nut member 67 into the male screw portion 66, the contact portion 67 is formed.
b presses the outer end portion 32f of the clutch rotor 32, and the clutch rotor 32 is moved to the outer housing 6
0, and the mounting position of the clutch rotor 32 is determined at the formation end of the spline 65.

Therefore, in this embodiment, a large torque is input from the outer housing 60 to the clutch rotor 32 at the time when the pilot clutch mechanism 30 is engaged, but this large torque can be supported by the spline 65. The supporting strength can be kept high.

Further, the clutch rotor 32, which is spline-coupled via the spline 65, can be securely held by the nut member 67 screwed to the outer housing 60.

By the way, in the electromagnetic clutch devices 10, 10a, 10b of the above-described respective embodiments, the main clutch mechanism 20 is engaged by engaging the pilot clutch mechanism 30.
Although the torque is transmitted from the outer housing 60 to the inner shaft 50, the case where the rotational force is input to the clutch rotor 32 from the outer housing 60 has been disclosed, but the invention is not limited to this. When torque is transmitted from the shaft 50 to the outer housing 50, the inner shaft 50
It is also possible to adopt a configuration in which the rotational force is input from the clutch rotor 32 to the clutch rotor 32.

Further, the present invention has been described with the electromagnetic clutch devices 10, 10a, 10b of the above-mentioned respective embodiments, but the present invention is not limited to this and various other embodiments can be configured without departing from the gist of the present invention. it can.

[0085]

According to the present invention as set forth in claim 1, since the pilot clutch mechanism is a modular structure in which the pilot clutch plate group, the electromagnetic solenoid and the armature are integrally assembled to the clutch rotor, only the pilot clutch mechanism is provided. It can be configured as an independent structure.

Therefore, since only the modularized pilot clutch mechanism can be taken out from the electromagnetic clutch device and the torque of this pilot clutch mechanism can be measured independently, the torque of the entire electromagnetic clutch device can be easily set within the set range. Therefore, the electromagnetic clutch device can be assembled more easily when the torque is measured, and the productivity can be improved.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the clutch rotor is formed by spline-connecting the pilot clutch plate group and the armature to the spline formed on the inner circumference of the clutch rotor. Since the armature retaining member is provided on the inner circumference, the position of the armature in the direction away from the pilot clutch plate group can be restricted by the retaining member.

Therefore, by setting the position of the retaining member so that an optimum gap is provided between the armature and the pilot clutch plate group, the regulating position of the armature is changed from the cam mechanism to the main clutch mechanism. Since it is possible to hold the relative rotation portion constant regardless of wear over time, it is possible to obtain a stable engagement timing of the pilot clutch mechanism at all times.

According to the third aspect of the present invention, in addition to the effect of the second aspect of the present invention, notches are formed at appropriate intervals in the circumferential direction in the portion of the clutch rotor where the retaining member is disposed. Therefore, since the contact area of the retaining member with the clutch rotor can be reduced, the amount of magnetic flux passing through the clutch rotor is reduced to the retaining member, the suction force of the armature is kept high, and by extension, the fastening of the pilot clutch mechanism. Power can be increased.

According to the present invention described in claim 4, in addition to the effects of the inventions of claims 2 and 3, the divided rotor body portion and the annular portion are integrally coupled to form the clutch rotor. Since the annular portion where the spline that requires precision and the rotor body portion having a relatively simple structure can be separately formed, the respective processing is facilitated, and the annular portion and the rotor body portion are formed. The material of and can be different.

By forming the annular portion and the non-magnetic material, it is possible to suppress leakage of magnetic flux which reduces the attractive force to the armature.

According to the present invention described in claim 5, in addition to the effects of the inventions of claims 1 to 4, rotation of the clutch rotor of the modularized pilot clutch mechanism is input to the clutch rotor to rotate the inner and outer circumferences. Since it is screwed to one of the members via the threaded portion, the relative distance between the modularized pilot clutch mechanism, particularly the armature positioned in the clutch rotor and the cam mechanism and the main clutch mechanism can be set accurately. .

According to the sixth aspect of the present invention, in addition to the effects of the first to fourth aspects of the present invention, the clutch rotor of the modularized pilot clutch mechanism is input to the clutch rotor for rotation input to the inner and outer peripheral sides. Since a spline connection is made to one of the members, and the outer end portion of the clutch rotor is retained and fixed by a nut member screwed to one of the inner and outer rotating members via a screw portion, a large torque acts. The supporting strength of the clutch rotor can be kept high through the spline connection, and the clutch member that is spline-connected can be reliably retained by the nut member.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an electromagnetic clutch device showing a first embodiment of the present invention.

FIG. 2 is an explanatory view showing an end portion shape on a spline formation side of the clutch rotor showing the first embodiment of the present invention with a plan view (a) and an end view (b).

FIG. 3 is a sectional view of an electromagnetic clutch device showing a second embodiment of the present invention.

FIG. 4 is a sectional view of an electromagnetic clutch device showing a third embodiment of the present invention.

FIG. 5 is a sectional view of a conventional electromagnetic clutch device.

FIG. 6 is a sectional view of another conventional electromagnetic clutch device.

[Explanation of symbols]

10, 10a, 10b Electromagnetic clutch device 20 Main clutch mechanism 30 Pilot clutch mechanism 31 Pilot clutch plate group 32 clutch rotor 32c spline 32a rotor body 32b annular part 32e Male thread 33 Electromagnetic solenoid 34 Armature 40 ball cam (cam mechanism) 41 Cam input section 42 Pressure plate 50 Inner shaft (Inner rotating member) 60 Outer housing (outer rotating member) 64 female thread 65 splines 66 Male Thread 67 Nut member 70 Snap ring (retaining member) 70a circumferential groove 70b Notch

Claims (6)

[Claims] 1. A main clutch mechanism configured between an inner peripheral side rotating member and an outer peripheral side rotating member arranged concentrically, and a rotational force input to a cam input section is converted into an axial pressure contact force. And a pilot clutch mechanism for transmitting and controlling the rotation of any one of the inner and outer peripheral side rotating members to the cam input portion in the engaged state, and the pilot clutch The mechanism includes a pilot clutch plate group, a clutch rotor arranged on one side of the pilot clutch plate group to which the rotation of one of the inner and outer peripheral side rotating members is input, and an electromagnetic solenoid provided in the clutch rotor. An armature arranged on the other side of the pilot clutch plate group and attracted by an electromagnetic force generated in the electromagnetic solenoid, In the electromagnetic clutch device that presses the pilot clutch plate group between the clutch rotor and the clutch rotor by suction to fasten the pilot clutch mechanism, the pilot clutch mechanism includes the pilot clutch plate group in the clutch rotor, The electromagnetic solenoid and the armature are integrally assembled into a module structure, and the modularized pilot clutch mechanism is detachably coupled while engaging the clutch rotor and one of the inner and outer peripheral side rotating members in the rotational direction. An electromagnetic clutch device characterized by the following. 2. The electromagnetic clutch device according to claim 1, wherein the modularized pilot clutch mechanism includes a spline formed on an inner circumference of a clutch rotor, a pilot clutch plate group and the spline formed from an end side of the spline. An electromagnetic clutch device, characterized in that the armature is spline-connected in order, and a retaining member for the armature is provided on the inner circumference of the clutch rotor in which the spline is formed. 3. The electromagnetic clutch device according to claim 2, wherein notches are formed at appropriate intervals in a circumferential direction in a portion of the clutch rotor where the retaining member is arranged. . 4. The electromagnetic clutch device according to claim 2 or 3, wherein the clutch rotor is divided into a rotor main body portion in which the electromagnetic solenoid is arranged and an annular portion in which the spline is formed, and these are separated from each other. An electromagnetic clutch device characterized in that the rotor main body portion and the annular portion, which are processed and divided as described above, are integrally coupled to each other. 5. The electromagnetic clutch device according to any one of claims 1 to 4, wherein the clutch rotor of the modularized pilot clutch mechanism is one of the inner and outer peripheral side rotating members that rotationally input to the clutch rotor. An electromagnetic clutch device, characterized in that the electromagnetic clutch device is screwed through a threaded portion. 6. The electromagnetic clutch device according to claim 1, wherein the clutch rotor of the modularized pilot clutch mechanism is one of the inner and outer peripheral side rotating members that rotationally input to the clutch rotor. And the outer end of the clutch rotor with the inner,
An electromagnetic clutch device, wherein a nut member screwed to one of the outer rotating members via a threaded portion is retained and fixed.